<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<select name="city" id="xx1" multiple>
    <option value="1">沙河市</option>
    <option value="2" selected>于辛庄市</option>
    <option value="3">回龙观市</option>

</select>


按着ctrl多选
<div id="xx2"></div>

<label for="username">用户名:</label>
<!--用户名:-->
<input type="text" id="username">


<label>
    密码 <input type="password">
</label>


<textarea name="" id="" cols="100" rows="10">


</textarea>

</body>
</html>